Cells in the ________ system are sometimes named for their color, or the color they become when stained.

The diaphragms of a diaphragm type of valve are made of: 1. steel. 2. copper. 3. aluminum. 4. chrome-molybdenum

a. 2 c. 3 and 4 b. 2 and 3 d. 1 and 2

In a partial pressure of oxygen (PCO2) electrode, carbon dioxide does which of the following?

1. It reacts with potassium chloride. 2. It reacts with water to form carbonic acid. 3. It diffuses through a polyethylene membrane. 4. It diffuses through a semipermeable Teflon membrane. a. 2 and 3 c. 1 and 4 b. 1 and 3 d. 2 and 4